Of course it's ok to fish for counterhits, but you have to know when to rushdown.
Also, 623D is a really good DP, but don't rely on it. As in, you should know how to get damage on the opponent with relying on them screwing up / not baiting DP.
Obviously, when you have the opportunity to go for a big combo, then go for it.
I dunno, it might be just my preference for playing style (which it probably is), but I prefer DP only when I can get good damage off of it. Sometimes you don't have a choice because you'll die if you don't (i.e. 360/720). Also, I might be influenced by Venom in GG, because he has no DP.
Edit: Yeah K2, Jin is really the "all around" character of BBCS. But that also means he isn't amazing at anything
Edit2: Wait K2...your Jin? The Jin that makes everyone go WTF?